[URL="http://api.tweetmeme.com/share?url=http://espn.go.com/nfl/story/_/id/6932377/peyton-manning-indianapolis-colts-practice-likely-doutbful&service=bit.ly&source=espn"][IMG]http://api.tweetmeme.com/imagebutton.gif?url=http://espn.go.com/nfl/story/_/id/6932377/peyton-manning-indianapolis-colts-practice-likely-doutbful[/IMG][/URL]The Indianapolis Colts said Monday that doctors have told quarterback Peyton Manning not to practice this week in advance of the season opener on Sunday.